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DesignSurface.cs
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DesignSurface.cs
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//
// System.ComponentModel.Design.DesignSurface
//
// Authors:
// Ivan N. Zlatev (contact i-nZ.net)
//
// (C) 2006-2007 Ivan N. Zlatev
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System;
using System.Collections;
using System.ComponentModel;
using System.ComponentModel.Design.Serialization;
using System.Reflection;
namespace System.ComponentModel.Design
{
public class DesignSurface : IServiceProvider, IDisposable
{
#region DefaultDesignerLoader : DesignerLoader
internal class DefaultDesignerLoader : DesignerLoader
{
// When DesignSurface.BeginLoad is invoked, the designer loader loads the design document, displays the designer
// surface using the IDesignerHost interface, and calls IDesignerLoaderHost.EndLoad
// when done. The IDesignerLoaderHost implementation is usually the same class that implements IDesignerHost.
// The designer loader informs the designer host that it needs to invoke a load or reload so that the designer
// host can perform additional tasks at these times.
private Type _componentType;
private bool _loading;
public override bool Loading
{
get { return _loading; }
}
public DefaultDesignerLoader (Type componentType)
{
if (componentType == null)
throw new ArgumentNullException ("componentType");
_componentType = componentType;
}
// Note that IDesignerLoader : IDesignerHost
//
public override void BeginLoad (IDesignerLoaderHost loaderHost)
{
_loading = true;
// initializa root component and designer
//
loaderHost.CreateComponent (_componentType);
// finish off loading - no error collection here.
//
loaderHost.EndLoad (_componentType.FullName, true, null);
_loading = false;
}
public override void Dispose ()
{
_componentType = null;
}
} // DesignerLoader
#endregion
private DesignerHost _designerHost;
private DesignSurfaceServiceContainer _serviceContainer;
private ICollection _loadErrors;
private bool _isLoaded;
private DesignerLoader _designerLoader;
public DesignSurface () : this ((IServiceProvider) null)
{
}
public DesignSurface (Type rootComponentType) : this (null, rootComponentType)
{
}
public DesignSurface (IServiceProvider parentProvider, Type rootComponentType) : this (parentProvider)
{
if (rootComponentType == null)
throw new System.ArgumentNullException ("rootComponentType");
BeginLoad (rootComponentType);
}
// this ctor doesn't load the surface
//
public DesignSurface (IServiceProvider parentProvider)
{
_serviceContainer = new DesignSurfaceServiceContainer (parentProvider);
_serviceContainer.AddNonReplaceableService (typeof (IServiceContainer), _serviceContainer);
_designerHost = new DesignerHost ((IServiceProvider) _serviceContainer);
_designerHost.DesignerLoaderHostLoaded += new LoadedEventHandler (OnDesignerHost_Loaded);
_designerHost.DesignerLoaderHostLoading += new EventHandler (OnDesignerHost_Loading);
_designerHost.DesignerLoaderHostUnloading += new EventHandler (OnDesignerHost_Unloading);
_designerHost.DesignerLoaderHostUnloaded += new EventHandler (OnDesignerHost_Unloaded);
_designerHost.Activated += new EventHandler (OnDesignerHost_Activated);
_serviceContainer.AddNonReplaceableService (typeof (IComponentChangeService), _designerHost);
_serviceContainer.AddNonReplaceableService (typeof (IDesignerHost), _designerHost);
_serviceContainer.AddNonReplaceableService (typeof (IContainer), _designerHost);
_serviceContainer.AddService (typeof (ITypeDescriptorFilterService),
(ITypeDescriptorFilterService) new TypeDescriptorFilterService (_serviceContainer));
ExtenderService extenderService = new ExtenderService ();
_serviceContainer.AddService (typeof (IExtenderProviderService), (IExtenderProviderService) extenderService);
_serviceContainer.AddService (typeof (IExtenderListService), (IExtenderListService) extenderService);
_serviceContainer.AddService (typeof (DesignSurface), this);
SelectionService selectionService = new SelectionService (_serviceContainer);
_serviceContainer.AddService (typeof (ISelectionService), (ISelectionService) selectionService);
}
protected ServiceContainer ServiceContainer {
get {
if (_designerHost == null)
throw new ObjectDisposedException ("DesignSurface");
return _serviceContainer;
}
}
public IContainer ComponentContainer {
get {
if (_designerHost == null)
throw new ObjectDisposedException ("DesignSurface");
return _designerHost.Container;
}
}
public bool IsLoaded {
get { return _isLoaded; }
}
// Returns a collection of loading errors or a void collection.
//
public ICollection LoadErrors {
get {
if (_loadErrors == null)
_loadErrors = new object[0];
return _loadErrors;
}
}
public object View {
get {
if (_designerHost == null)
throw new ObjectDisposedException ("DesignSurface");
if (_designerHost.RootComponent == null || this.LoadErrors.Count > 0)
throw new InvalidOperationException ("The DesignSurface isn't loaded.");
IRootDesigner designer = _designerHost.GetDesigner (_designerHost.RootComponent) as IRootDesigner;
if (designer == null)
throw new InvalidOperationException ("The DesignSurface isn't loaded.");
ViewTechnology[] viewTech = designer.SupportedTechnologies;
for (int i = 0; i < viewTech.Length; i++) {
try {
return designer.GetView (viewTech[i]);
} catch {}
}
throw new NotSupportedException ("No supported View Technology found.");
}
}
public event EventHandler Disposed;
public event EventHandler Flushed;
public event LoadedEventHandler Loaded;
public event EventHandler Loading;
public event EventHandler Unloaded;
public event EventHandler Unloading;
public event EventHandler ViewActivated;
public void BeginLoad (Type rootComponentType)
{
if (rootComponentType == null)
throw new System.ArgumentNullException ("rootComponentType");
if (_designerHost == null)
throw new ObjectDisposedException ("DesignSurface");
this.BeginLoad (new DefaultDesignerLoader (rootComponentType));
}
public void BeginLoad (DesignerLoader loader)
{
if (loader == null)
throw new System.ArgumentNullException ("loader");
if (_designerHost == null)
throw new ObjectDisposedException ("DesignSurface");
if (!_isLoaded) {
_loadErrors = null;
_designerLoader = loader;
this.OnLoading (EventArgs.Empty);
_designerLoader.BeginLoad (_designerHost);
}
}
#region IDisposable
public void Dispose ()
{
this.Dispose (true);
}
protected virtual void Dispose (bool disposing)
{
if (_designerLoader != null) {
_designerLoader.Dispose ();
_designerLoader = null;
}
if (_designerHost != null) {
_designerHost.Dispose ();
_designerHost.DesignerLoaderHostLoaded -= new LoadedEventHandler (OnDesignerHost_Loaded);
_designerHost.DesignerLoaderHostLoading -= new EventHandler (OnDesignerHost_Loading);
_designerHost.DesignerLoaderHostUnloading -= new EventHandler (OnDesignerHost_Unloading);
_designerHost.DesignerLoaderHostUnloaded -= new EventHandler (OnDesignerHost_Unloaded);
_designerHost.Activated -= new EventHandler (OnDesignerHost_Activated);
_designerHost = null;
}
if (_serviceContainer != null) {
_serviceContainer.Dispose ();
_serviceContainer = null;
}
if (Disposed != null)
Disposed (this, EventArgs.Empty);
}
#endregion
public void Flush ()
{
if (_designerLoader != null)
_designerLoader.Flush ();
if (Flushed != null)
Flushed (this, EventArgs.Empty);
}
private void OnDesignerHost_Loaded (object sender, LoadedEventArgs e)
{
this.OnLoaded (e);
}
private void OnDesignerHost_Loading (object sender, EventArgs e)
{
this.OnLoading (EventArgs.Empty);
}
private void OnDesignerHost_Unloading (object sender, EventArgs e)
{
this.OnUnloading (EventArgs.Empty);
}
private void OnDesignerHost_Unloaded (object sender, EventArgs e)
{
this.OnUnloaded (EventArgs.Empty);
}
protected virtual void OnLoaded (LoadedEventArgs e)
{
_loadErrors = e.Errors;
_isLoaded = e.HasSucceeded;
if (Loaded != null)
Loaded (this, e);
}
protected virtual void OnLoading (EventArgs e)
{
if (Loading != null)
Loading (this, e);
}
protected virtual void OnUnloaded (EventArgs e)
{
if (Unloaded != null)
Unloaded (this, e);
}
protected virtual void OnUnloading (EventArgs e)
{
if (Unloading != null)
Unloading (this, e);
}
internal void OnDesignerHost_Activated (object sender, EventArgs args)
{
this.OnViewActivate (EventArgs.Empty);
}
protected virtual void OnViewActivate (EventArgs e)
{
if (ViewActivated != null)
ViewActivated (this, e);
}
[ObsoleteAttribute("CreateComponent has been replaced by CreateInstance")]
protected internal virtual IComponent CreateComponent (Type componentType)
{
return (this.CreateInstance (componentType)) as IComponent;
}
// XXX: I am not quite sure if this should add the created instance of the component
// to the surface, but it does. (If one finds out that this is wrong just use
// _designerHost.CreateInstance (..)
//
protected internal virtual object CreateInstance (Type type)
{
if (type == null)
throw new System.ArgumentNullException ("type");
return _designerHost.CreateComponent (type);
}
protected internal virtual IDesigner CreateDesigner (IComponent component, bool rootDesigner)
{
if (component == null)
throw new System.ArgumentNullException ("component");
if (_designerHost == null)
throw new System.ObjectDisposedException ("DesignerSurface");
return _designerHost.CreateDesigner (component, rootDesigner);
}
public INestedContainer CreateNestedContainer (IComponent owningComponent)
{
return this.CreateNestedContainer (owningComponent, null);
}
public INestedContainer CreateNestedContainer (IComponent owningComponent, string containerName)
{
if (_designerHost == null)
throw new ObjectDisposedException ("DesignSurface");
return new DesignModeNestedContainer (owningComponent, containerName);
}
#region IServiceProvider
public object GetService (Type serviceType)
{
if (typeof (IServiceContainer) == serviceType)
return _serviceContainer;
return _serviceContainer.GetService (serviceType);
}
#endregion
}
}